Code
C1373
MITSUBISHI
C — Chassis
Yaw rate SNSR.high voltage
Views:
UK: 17
EN: 32
RU: 24
AI status
Completed
Completed
100%
Causes
- Open, short or corrosion in yaw rate sensor wiring or connector
- Yaw rate sensor has internal fault (failed MEMS or electronics)
- Short to battery voltage on the sensor signal or Vref circuit
- Poor or missing ground at sensor or module
- Water intrusion or physical damage to sensor
- Faulty ABS/ESC control module (less common)
Symptoms
- ABS, VSC/ESC or traction control warning lamp illuminated
- Stability and traction control functions disabled or reduced
- Possible drivability or handling irregularities under hard maneuvers
- Stored DTC(s) related to yaw rate/IMU or ABS sensors
What to check
- Read all stored and pending codes with an OBD-II scan tool; note freeze frame data
- Visually inspect yaw rate sensor and connector for damage, corrosion or water
- Check battery voltage and vehicle electrical system stability
- Backprobe sensor connector: verify Vref (typically ~5V), ground, and signal
- Measure signal voltage at rest and while rotating vehicle gently (if safe) or using a diagnostic tester
- Wiggle harness/connector while monitoring live data for intermittent faults
Signal parameters
- Typical sensor supply (Vref): ~5 V (varies by vehicle) — verify against service manual
- Signal mid/reference (zero yaw) often near ~2.5 V for MEMS sensors
- Operating signal range: ~0.1–4.9 V depending on rotation direction and rate
- High-voltage fault threshold often > ~4.5 V (manufacturer-specific)
- Impedance/continuity: consult factory wiring diagram for expected resistance
Diagnostic algorithm
- Connect scan tool, record C1373 and any related codes; note freeze frame and live data.
- Visually inspect sensor, wiring, and connector for damage, corrosion, or moisture.
- With ignition ON, backprobe connector: verify Vref, ground and signal voltages. Confirm Vref present and stable.
- If signal is above expected threshold, disconnect sensor and re-check signal at harness for short to battery. If voltage remains high with sensor disconnected, suspect wiring/short to +12V or ECU issue.
- Perform continuity and short-to-power/ground tests on wiring between sensor and ABS/ESC module.
- Wiggle harness and connectors while monitoring live data to locate intermittent faults.
- If wiring and power/ground are correct, replace yaw rate sensor and re-test.
- After repair, clear codes and perform road test to confirm proper sensor readings and no return of C1373.
- If problem persists after sensor replacement, check ABS/ESC control module and its grounds; consult wiring diagrams and manufacturer service procedures.
Likely causes
- Damaged wiring harness or pin(s) shorted to +12V
- Corroded/loose connector at yaw rate sensor
- Failed yaw rate sensor
- Bad ground at sensor or control module
Fault status
Status
Yaw rate sensor: detected signal voltage higher than permissible range. Stability/traction control function may be disabled.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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